Lease renewal - roommate hasn't signed new lease but will not leave or pay rent.
My roommate/best friend and I have lived in the same three bedroom apartment in New Jersey for 4 years. This past year we took in a 3rd roommate that we had met through friends. Upon her moving in the 3rd roommate signed the current lease agreement, which is now due to end in a few days. About two months ago the 3rd roommate sent us an email stating she would not be renewing. We've had an absolutely horrible experience with her and did not want her to renew, so this worked out perfectly for us. We notified the landlord that she would not be renewing, but that the two of us would be renewing for another year, which he agreed to. We made a written agreement with the 3rd roommate stating she would be moved out by no later than midnight the last day of the lease. At the time of the written agreement she agreed to all of the terms, stating she would be out of the apartment at the end of the lease.
The lease is about to end in a few days and she is now refusing to leave. My current roommate and I have already signed the new lease agreement for the next year. What can we do to force the this person, who has not renewed the lease, out of the apartment? The landlord and realtor have said we don't have any options other than to ask for this person to pay rent?